Which is the most interesting series technologically speaking?

At the moment I don't have much time to follow motorsport apart from F1 and sometimes DTM, but I would like to know which is the series that has the most technical improvements from car to car. In other words, I don't like spec racing, I like the cars being very different to each other. Which motorsport competition offers that?

sportscars (le mans various series) and off roading (trophy trucks and the entire american scene, dakar ). and drifting
theres supergt from japan but thats probably hard to find with english commentary

At the moment I don't have much time to follow motorsport apart from F1 and sometimes DTM, but I would like to know which is the series that has the most technical improvements from car to car. In other words, I don't like spec racing, I like the cars being very different to each other. Which motorsport competition offers that?

At the moment I don't have much time to follow motorsport apart from F1 and sometimes DTM, but I would like to know which is the series that has the most technical improvements from car to car. In other words, I don't like spec racing, I like the cars being very different to each other. Which motorsport competition offers that?

LeMans I think is the series for you then. It's all about the car, and the teams usually have very different ways of skinning the cat. It's not the most competitive series these days, but from a technical perspective i'd say it's much, much more interesting than F1 is.

Then I guess, it's hard to get past GT3 (GT2/GTP/GTS) at the moment.
But the cars go through the "battle of performance", so on a weight to power basis, they are about equal.
The racing is not that shabby either - most of the time.
But GT type, long(er) distance racing, is not everyones "cup of tea".

For many years SuperGT (Japan) was pretty "full on", partly because there was open tyre competition as well,
but they now also move closer to an DTM style rule book.